Improvement in gas-machines



THOMAS B. roem-TY.

Improvemen't'in Gas-Machines.

No. H5594. mm 1e6,1811.

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lidi-"ROVEMENT IN GASf'WiACi-HNES.

Specification forming part of Letters Patent No. 115,594, dated June 6,1871.

is vaporized under pressure by the application of external heat, and inwhich a proper supply and admixture of air are induced and maintained bythe escaping force of the gas or vapor itself, the manufacture of gasand the supply thereof to the burners being regulated and controlledautomatically by the rising and falling of a holderor flexiblediaphragm, as already explained in the specifications of Maxim andRedley, and Manssard, and in my Own specifications (cases 1 and 2) filedMay 1, 1871; but it refers more particu larly to the valves by which thesupply of hydrocarbon vapor is regulated and controlled, and to thepeculiar mode of constructing and operating the same, and itscombinations with other parts, to be hereafter described or referred to.The object of my invention is to simplify the action Of'vapor-valves ofgas-ma chines, such as I have described, to render them more definiteand positive in their action, and to do away with the necessity of thedouble-seated valve described by Maxim, the use of which is attendedwith so much inconvenience and diculty, or the equally complex anduncertain arrangement claimed by Strong and Reid in their patentNo.112,981, dated March 21, 1871. In both these cases the valvestem orthe actuating rock-shaft, as the case may be, before being connectedwith the actuating devices, is passed through a plate, or partition, orsuitable bearing arranged there in, exposed to the full pressure of thevapor in the tank, often twenty-five or thirty pounds` to the inch,which makes it extremely difficult to make a tight joint Withoutcreating too much friction. Y

0n reference to Strong and Reids drawing it will be seen that the devicewhich they use for making a tight joint consists of placing upon therock-shaft a valve, which is held against its seat by a spring. Thiscreates a great deal of friction, especially when the machine has beenin use for some time and the face and seat of the valve have becomegummed up and perhaps incrusted with carbon. Be sides, the parts areusually very hot and the sprn g loses its temper, so that, beingloosened from its seat, the valve leaks.

' Maxim uses a double-seated valve, but even with this it has been foundnecessary to fit the valve-stem snugly in its bearing, or a largequantity of pure vapor will escape through the joint into the machineevery time the'valve is opened or closed; also, the least quantity ofrust, or gum, or carbon will make the stem stick fast .in its bearingand stop the machine. The object of my invention is to obviate thedifficulties above described, and for this purpose I pass my valve-stemdirectly through the blowpipe and connect it with the actuating devicesthrough an ordinary stufng-box placed directly opposite the mouth of theblowpipe, Where the pressure on the jointwill not at any time exceedthat of the holder, usually about one ounce to the inch. In cases wherethe valve-gear is placed Within the holder or diaphragm I connect thevalve-stem and its actuating devices directly with the holder ordiaphragm, Without the intervention even of a lstuiiing-box or ofanything more than an ordinary guide post or frame.

On the point of the valve, and extending from it through the jet andinto the vaportube, I place a needleshaped guide, the only object ofWhich is that it may guide the valve to its seat with certainty. Thisneedle-guide is not by any means "the same as the conical double-seatedvalve described and claimed by Strong and Reid in the specification oftheir patent before referred to, for theirs is a conical valve Workingwithin the vapor-tube, regulated by the pressure at the outlet, andWorking continuously in the same manner as an ordinary gas-governor,towhich its action is perfectly analogous, While my needle-joint merelyserves as a guide to a valve Working intermittently and opening orclosing entirely as the holder yor diaphragm rises or falls, as has beenalready described by me in my specifications (cases 1 and 2) beforereferred to.

Description of the .Umwi-ng.

A, Fig. 1, is the vaponvalve furnished with the needle-guide c', passingthrough the j et B,

against which the shoulder of A seats itself when the valve is closed.The stem of A passes entirely through the blow-pipe C and through thepartition D opposite the mouth of G. E is the pipe leading from theretort to the jet. F

is part of the retort, and H ofthe stove, both of Which are so Wellknown as not to need description. I is the air-valve and appendagesalready described by me in specification No.3,

iled May 3, 1871. J is the clutch, and K the lever already described inspecification of case No. 4, led May 5, 1871. L is the chamber intoWhich the mixed gases and air are thrown, and from which they pass tothe holder. Fig.

2 shows the connection of the valve-stem A,

blow-pipe C, springs M, partition D, chamber L, and lever K, as alreadydescribed. The retort and stove, Fig. l, are cut od' so as to show but acorner of each.

- The sameletters refer to the same parts in both figures.

Claims.

I claim- 1. A valve, A, with its needle-guide a passing through thevapor-jet and Working intermittently, having its stem passing directlythrough the vblow-pipe C, and connected with the actuating deviceseither directly or through the partition D opposite the mouth of C, substantially as set forth.

2. The subject-matter of the rst claim, in combination with the lever K,clutch J, and air-,Vah'e I, substantially as and for the pub poses setforth.

THOS. B. FOGARTY.

Witnesses 0. E. MYERS, Jos. T. K. PLANT.

